JWT Decoder
Decode and inspect JSON Web Tokens (JWT). View header, payload, and expiration information.
How to Use
- Paste your JWT token in the input field
- Click Decode to parse the token
- View header, payload, and timestamp info
Frequently Asked Questions
What is a JWT?
JWT (JSON Web Token) is a compact, URL-safe means of representing claims between two parties. It's commonly used for authentication.
Is this secure?
Yes, decoding happens entirely in your browser. JWTs are not encrypted, just encoded - the signature is for verification, not secrecy.
Can I verify signatures here?
This tool decodes tokens only. Signature verification requires the secret key, which should never be shared.